How to solve the problem of high idle speed of cleaning throttle

When your SUV has been running for about 5 years, about 80 thousand kilometers, but the idle speed of the car has been very high, it will still happen that you go to the 4S shop to change the idle motor. What is the reason? What should I do with it?

In the case of high idle speed and replacement of idle speed motor, further inspection shall be made according to the following three points:

1. Check the engine vacuum tube for air leakage, and replace the vacuum tube if air leakage is determined.

2. Check whether the engine fault light on the instrument panel flashes. If engine failure is found, you should immediately go to the 4S shop for computer inspection to see which parts have problems that lead to unstable idle speed, including sensor failure, engine combustion failure, valve position sensor failure and so on.

3. Check whether the throttle valve is dirty. Whether there is carbon deposit in throttle and idle Madari. Unclean throttle will lead to lax throttle closing or stagnation of idle stepper motor, which will lead to excessive engine idle speed.